/Engine/Plugins/MovieScene/MovieRenderPipeline/Source/MovieRenderPipelineCore/Public/MoviePipelineBase.h
The params struct in the return will have metadata about files written to disk for each shot.
[FMoviePipelineWorkFinishedNative](API\Plugins\MovieRenderPipelineCore\FMoviePipelineWorkFinishedNative) & OnMoviePipelineWorkFinished()